BPG致力于知识的发现和传播
Total Visits of This Article
2021 | 总访问次数
排名 国家/地区 数量 占比
1 China 51 54.3%
2 Germany 12 12.8%
3 Netherlands 11 11.7%
4 United States 8 8.5%
5 Russia 5 5.3%
6 United Kingdom 2 2.1%
7 France 2 2.1%
8 Czech Republic 1 1.1%
9 Brazil 1 1.1%
10 Canada 1 1.1%